#coding=utf-8
#import sys

#a = sys.argv[1]
#b = sys.argv[2]
#print("%s*%s=%s"%(a,b,int(a)*int(b)))
#print np.zeros((2,2))
#print('hello world!')

import numpy as np
import pandas as pd

a = pd.DataFrame(np.array([[3,2],[2,5]]),columns=['a','b'])
print(np.zeros((2,2)))
print(a)